OLEAGINOUS
greasy, oily, sebaceous, oleaginous
(adjective) containing an unusual amount of grease or oil; “greasy hamburgers”; “oily fried potatoes”; “oleaginous seeds”
buttery, fulsome, oily, oleaginous, smarmy, soapy, unctuous
(adjective) unpleasantly and excessively suave or ingratiating in manner or speech; “buttery praise”; “gave him a fulsome introduction”; “an oily sycophantic press agent”; “oleaginous hypocrisy”; “smarmy self-importance”; “the unctuous Uriah Heep”; “soapy compliments”
Source: WordNet® 3.1
Etymology
Adjective
oleaginous (comparative more oleaginous, superlative most oleaginous)
Oily, greasy.
(of manner or speech) Falsely or affectedly earnest; persuasively suave.
Synonyms
• (oily, greasy): greasy, oily, sebaceous, unctuous
• (falsely or affectedly earnest): fulsome, smarmy, unctuous
Source: Wiktionary
O`le*ag`i*nous, a. Etym: [L. oleaginus, oleagineus, belonging to the
olive, fr. olea olive: cf. F. oléagineux. See Olive, Oil.]
Definition: Having the nature or qualities of oil; oily; unctuous.
Source: Webster’s Unabridged Dictionary 1913 Edition